MacBookのHDDが不機嫌です…

disk0s2: I/O error.
         0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 459226904] [LBlkNum 40641] [FSLogMsgID 247638304] [FSLogMsgOrder First] 
         0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [DevNode /dev/disk0s2] [MountPt /] [Path /Users/syuu/Library/Mail/Envelope Index] [FSLogMsgID 247638304] [FSLogMsgOrder Last] 
disk0s2: I/O error.
         0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 459226904] [LBlkNum 40641] [FSLogMsgID 1229801749] [FSLogMsgOrder First] 
         0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [DevNode /dev/disk0s2] [MountPt /] [Path /Users/syuu/Library/Mail/Envelope Index] [FSLogMsgID 1229801749] [FSLogMsgOrder Last] 
disk0s2: I/O error.
         0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [ErrType IO] [ErrNo 5] [IOType Read] [PBlkNum 459226904] [LBlkNum 40641] [FSLogMsgID 1392654267] [FSLogMsgOrder First] 
         0 [Level 3] [ReadUID 0] [Facility com.apple.system.fs] [DevNode /dev/disk0s2] [MountPt /] [Path /Users/syuu/Library/Mail/Envelope Index] [FSLogMsgID 1392654267] [FSLogMsgOrder Last] 
CODE SIGNING: cs_invalid_page(0x1000): p=2988[GoogleJapaneseIn] clearing CS_VALID

で、こうなってる間ほぼフリーズする。まぁ当然の結果だろうが…問題は、この子いつまで持つんだろうか…